I saw them when I was hunting for my grandson's gift a remote control rack crawler/off road and they even have motors which is mind boggling. Lego have really turned their company around as they were struggling at one pint. I am sure the 3d printers have helped create these models as this is not cheap to design and get from drawing board to prototype.
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Yep, that orange 4x4 and the Volvo hauler in this post are remote control via an app on my phone. It's a lot of fun making Lego move.